Well considering that I have both rifles I think I will put my oar in the water here.
The Triumph came out of the box with an excellent trigger and all I have done to it is put a rubber and steel washer between the forearm and the barrel lugs and it has shot a quite a few groups around a 1/2 inch at a 100 yds and one 1/4 inch 3 shot group at 100yds now that's as good as it has ever got for me. It is light and it does kick some.
The Endeavor cost me 3 times as much and I had to polish the trigger and sear surfaces and change a couple springs and do some sanding and grinding on the fore arm. The normal group is about 1.25 inches but the brass Lehigh bullets will shoot under an inch, one of the differences is it will shoot almost any bullet around the 1.25 area. there are a few other things I can say for it the kick is much reduced so it is more fun to shoot some of the heavy loads I like, and then there is the barrels, I have been looking at two center fire barrels and a 45 muzzle loading barrel.
So my conclusion is they both have certain advantages, maybe like me you need one of each. Lee